The genesis of the states of Sn‐containing components of catalysts prepared by impregnating the pre.

No abstract

Phase composition and components of mixed Fe(III)–Al(III) hydroxides and oxides obtained by ageing the hydroxides are examined mainly by Mössbauer spectroscopy over a wide range of the Al/Fe atomic ratio. The α‐(Fe1–cAlc)2O3 type oxide and the orthorhombic Al2O3, boehmite, are identified in the system studied. An analysis of Heff as a function of c indicates that the maximum value of c ranges from 0.31 to 0.33 regardless of the mixed oxide preparation method. An analysis of the recoil‐free fraction f′(T) and a subsequent calculation of the force constants of the iron–oxygen bonds show that an increase in “c” leads to their weakening.